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Research on Reclamation and Activation of Moulding Sands Containing Water-Glass Hardened with Microwaves

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Presented are results of a research on usability of an innovative reclamation process of microwave-hardened moulding sands containing water-glass, combined with activation of binder. After each subsequent stage of reclamation, quality of the reclaimed material was determined on the grounds of measurements of permeability and results of screen analysis. The reclaimed material was next used again to prepare new moulding sand. The sandmix based on high-silica sand prepared with water-glass grade 145, was subject to the following cyclical treatment operations: mixing components, consolidation, microwave hardening, cooling, heating the mould up to 800°C, cooling to ambient temperature, mechanical reclamation dry and wet. It was found that the used-up and reclaimed sandmix containing water-glass is susceptible to the applied activation process of thermally reacted film of binder and, in addition, it maintains good quality and technological properties of high-silica base. Observations of surfaces of reclaimed high-silica grains with activated film of reacted inorganic binder were carried-out using a scanning microscope. Thanks to properly selected reclamation parameters, the high-silica base can be reused even five times, thus reducing demand for fresh aggregate and inorganic binder.
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Bibliogr. 12 poz., rys., wyk.
  • Foundry and Automation Team, Wroclaw University of Technology, ul. Łukasiewicza 5, 50-371 Wrocław, Poland
  • Foundry and Automation Team, Wroclaw University of Technology, ul. Łukasiewicza 5, 50-371 Wrocław, Poland
  • [1] Lewandowski, J. L. (1992). Moulding materials, research. Part II. Kraków: AGH University of Science and Technology Press.
  • [2] Jelinek, P., Polzin, H. & Skuta, R. (2004). Utilization of physical dehydration for hardening of cores Bonded with colloidal solutions of alkaline silicates. Acta Metallurgica Slovaca. 10(1), 10-23.
  • [3] Stachowicz, M., Granat, K. & Nowak, D. (2013). Dielectric hardening method of sandmixes containing hydrated sodium silicate. Metalurgija. 52(2), 169-172.
  • [4] Wang, J., Fan, Z. & Zan X. (2009). Properties of sodium silicate sand hardened by microwave heating. China Foundry. 6(03), 191-196.
  • [5] Jelinek, P. (2005). Development of inorganic binders for dehydrative microwave hardening. 8th Foundry Conference Technical 2005. 12÷13.05.2005. 5-13. Nowa Sól.
  • [6] Stachowicz, M. & Granat, K. (2013). Absorption of microwaves by untreated moulding sands containing waterglass Archives of Foundry Engineering.13(spec. 1), 169-174.
  • [7] Dańko, R. (2009). Work of destruction of intergranular bonds in mechanical reclamation process of used-up moulding sands. Archives of Mechanical Technology and Automation. 29(3), 23-32.
  • [8] Dańko, J., Dańko, R. & Łucarz, M. (2007). Processes and equipment for reclamation of base of used-up moulding sands. Kraków: Scientific Publishing House Akapit.
  • [9] Dańko, J., Kamińska, J. & Skrzyński, M. (2013). Reclamation of spent moulding sands with inorganic binders in the vibratory reclaimer Regmas. Archives of Metallurgy and Materials. 58(3), 993-996.
  • [10] Łucarz, M. (2008) Effect of intensity of mechanical reclamation operations on condition of high-silica base. 21st Foundry Conference Technical 2008, 29÷31.05.2008. Nowa Sól.
  • [11] Lewandowski, J. L. (1997). Materials for casting molds. Kraków: Scientific Publishing House Akapit.
  • [12] Stachowicz, M. & Granat, K. (2014). Possibilities of reclamation of microwave-hardened molding sands with water glass. XX International Conference of Polish, Czech and Slovak Foundrymen. 24÷26.04.2014. Izbicko k/Opola.
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